Oily water heating system with electromagnetic induction circulating heating and cooling functions

Abstract

The invention provides an oil-water mixture heating system with electromagnetic induction circulating heating and cooling functions, and belongs to heating devices. The two ends of the heating device are provided with inlet and outlet holes for a heated medium to flow in and out, and the inlet and outlet holes in the two ends of the heating device are communicated through a circulation pipeline; and the two ends of the cooling device communicate with the circulating pipeline, the heated medium flows into the cooling device from one end to be cooled and flows out of the circulating pipeline from the other end, and the cooling device is buried underground to prevent the phenomenon that the temperature is too low in winter, so that the medium is solidified and blocks the pipeline. The heating device and the cooling device are integrated into one system to realize cyclic heating and cooling of the oil-water mixture, so that the treatment and quality improvement efficiency of the oil-water mixture is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heating devices, and in particular to an oil-water heating system with electromagnetic induction circulation heating and cooling. Background Art

[0002] Oil is an important energy source indispensable for the development of human society. However, the water content of the oil extracted from oil fields is usually relatively high. Moreover, since most of China's oil fields are located in the north and the winter temperature is low, the water-oil mixture extracted from oil wells is extremely easy to solidify and cause pipeline blockage. Therefore, the extracted water-oil mixture is heated in a heating furnace and then flows into the pipeline to prevent pipeline blockage caused by the low temperature solidification of the water-oil mixture. And heating can promote the demulsification of the oil-water mixture, separate water from the oil-water mixture, thereby improving the quality and purity of the oil-water mixture, reducing the viscosity of the oil product, enhancing its fluidity, and facilitating transportation in the pipeline. This is of great significance for the exploitation and transportation processes of oil fields.

[0003] Traditional heating furnaces (such as tubular furnaces, water jacket furnaces, etc.) are used in oil fields. Usually, natural gas heating is used. The oil-water mixture is heated by burning natural gas and then injected into the oil well and transported through pipelines. However, traditional heating furnaces have disadvantages. On the one hand, due to the use of natural gas combustion heating, the heating location is limited and the heating process requirements are strict. At the same time, the gases such as carbon dioxide generated by combustion do not meet the current carbon peak requirements. On the other hand, after heating is completed, the excess oil-water mixture has too high a temperature and lacks a rapid cooling system. Usually, it takes a lot of time to wait for the oil-water mixture to cool. Therefore, the present invention designs a high-power high-frequency electromagnetic heating and rapid cooling device. The electromagnetic heating method is not restricted by gas pipelines. At the same time, off-peak power consumption and the comprehensive application of new energy + green electricity are used, which are both energy-saving and carbon-reducing. And the rapid cooling device also reduces the waste of resources of standby storage tanks. Summary of the Invention

[0004] In view of this, to solve the technical problem that the existing oil field heating furnaces lack electromagnetic induction heating and rapid cooling systems, the present invention provides an oil-water heating system with electromagnetic induction heating and cooling, integrating an electromagnetic induction heating device and a cooling device into one system to realize the circulating heating and cooling of the oil-water mixture, which greatly improves the efficiency of treating and upgrading the oil-water mixture.

[0005] To achieve the above object, the present invention provides the following technical solutions: An oil-water heating system with circulating electromagnetic induction heating and cooling, comprising: A heating device, with inlet and outlet holes for the medium to be heated to flow in and out at both ends thereof, and the inlet and outlet holes at both ends of the heating device are connected through a circulating pipeline; A cooling device is connected to both ends of the circulation pipeline. The heated medium flows into the cooling device from one end for cooling and flows out to the circulation pipeline from the other end. Considering the relatively low temperature in winter in oil fields, the circulating cooling device is buried underground. After heating, the medium flows into the cooling device through a pipeline for cooling, and the pipeline is placed underground to prevent the cooled medium from condensing and blocking the pipeline due to too low temperature.

[0006] Preferably, the heating device includes: A heating furnace, which is provided with a circle of electromagnetic heating elements along the circumferential direction of its inner surface, and one electromagnetic heating element is arranged every 30 degrees on the vertical plane of the circle where the electromagnetic heating elements are located.

[0007] Preferably, the electromagnetic heating element includes: A fixing device surface for fixing to the bottom hole on the heating furnace; A wiring device, which is arranged at the upper end of the fixing device surface, and the coil on it is connected into the space between the inner wall surface and the outer wall surface of the electromagnetic heating element from the wire inlet; A heating column, which is located at the lower end of the fixing device surface, and both ends are respectively connected to the lower end of the fixing device surface and the outer wall surface; A heating wall surface, which is located inside the heating column and has a gap for the heating medium to pass through between it and the heating column, and the heating wall surface has grooves.

[0008] Preferably, the cooling device includes: Cooling elements, which are formed by connecting several groups of cooling bodies in series through small pipelines; Several groups of the cooling elements are connected in series and / or in parallel to form the cooling device.

[0009] Preferably, the cooling device is buried underground.

[0010] Preferably, temperature sensors are arranged at both ends of the heating device.

[0011] Preferably, valves are arranged at both ends of the heating device.

[0012] Preferably, a first thermometer is arranged on the heating device.

[0013] Preferably, a heat insulation material is laid on the outer wall surface of the heating device.

[0014] Preferably, it further includes: A pump, which is connected to the circulation pipeline and is used to pump the heated medium into the heating device.

[0015] The present invention has the following beneficial effects compared with the prior art: The oil-containing water heating system with electromagnetic induction cycle heating and cooling provided by the present invention integrates a heating device and a cooling device into one system to achieve cycle heating and cooling of the oil-containing water, which greatly improves the convenience of the heating place and the characteristics of energy conservation and emission reduction.

[0016] The oil-containing water heating system with electromagnetic induction cycle heating and cooling provided by the present invention realizes the integration of heating and cooling through the cooling device. The setting of the cooling device greatly shortens the cooling time compared with natural cooling in the heating furnace, thereby improving the efficiency of treating and upgrading the oil-water mixture.

[0017] The electromagnetic heating elements of the present invention are arranged in a circle around the circumferential direction of the heating furnace, and an electromagnetic heating element is arranged every 30 degrees on the vertical plane of its circumference, which can not only avoid magnetic interference caused by too close coil distance, but also place as many heating elements as possible under the condition of conforming to the structure of the heating furnace, thereby improving the heating efficiency.

[0018] Other advantages of the present invention will be introduced in the following specific implementation part. Brief Description of the Drawings

[0019] Figure 1 is a three-dimensional view of the present invention; Figure 2 is a sectional view of the electromagnetic heating element; Figure 3 is a bottom view of the electromagnetic heating element; Figure 4 is a sectional view of the heating furnace; Figure 5 is a structural diagram of the cooling device; In the figure, 1, aperture; 2, electromagnetic heating element; 3, heating furnace; 4, inlet and outlet hole; 5, circulation pipeline; 6, valve; 7, temperature sensor; 8, switch; 9, cooling device; 10, small pipeline; 11, top of the electromagnetic heating element; 12, wiring device; 13, wire inlet; 14, bottom hole; 15, fixing device surface; 16, groove; 17, heating wall surface; 18, heating column; 19, outer wall surface; 20, inner wall surface; 21, coil; 22, cooling body; 23, cooling body inlet and outlet hole; 24, heat insulation material; 25, pump; 26, first thermometer. Detailed Description of the Invention

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] The present invention provides an oil-containing water heating system with electromagnetic induction cycle heating and cooling, including: A heating device, with inlet and outlet holes 4 for the medium to be heated to flow in and out at both ends, and the inlet and outlet holes 4 at both ends of the heating device are connected through a circulation pipeline 5.

[0024] A cooling device 9, connected to the circulation pipeline 5 at both ends. The heated medium flows into the cooling device 9 from one end for cooling and flows out to the circulation pipeline 5 from the other end.

[0025] Considering the relatively low temperature in winter in the oilfield, the circulation cooling device is buried underground. The medium after heating flows into the cooling device 9 through a pipeline for cooling, and the pipeline is placed underground to prevent the cooled medium from solidifying and blocking the pipeline due to too low temperature.

[0026] As Figure 1 、 4 shown, the present invention provides an implementation manner of the above oil-containing water heating system with electromagnetic induction cycle heating and cooling. In the present invention, the heating device includes: The heating furnace 3 is provided with a circle of electromagnetic heating elements 2 along the circumferential direction of its inner surface. The electromagnetic heating elements 2 are arranged at intervals of 30 degrees on the vertical plane of the circumference where they are located. Around the device in the middle vertical plane for one full circle, there is an aperture 1 with a diameter of 0.2 meters at intervals of 30 degrees. When heating the oil-water mixture produced in the oil field, the electromagnetic heating elements 2 are fixed to the heating furnace 3 with bolts for heating. Considering that electromagnetic waves attenuate with the increase of distance and there is electromagnetic interference when the coils 21 are too close, and also considering the external shape structure of the heating device and the dimensional structure of the heating furnace 3, placing an electromagnetic heating element 2 at intervals of 30 degrees on the circumference in the vertical plane can not only avoid the magnetic interference caused by the coils 21 being too close, but also place as many heating elements as possible under the condition of conforming to the structure of the heating furnace 3, thus improving the heating efficiency.

[0027] As Figure 1 , 4 shown, there is an inlet / outlet hole 4 with a diameter of 5 cm at each of the left and right ends of the heating device. The inlet / outlet holes 4 are used for the inflow and outflow of the medium to be heated in the device. The oil-water mixture to be heated is added into the heating device through these two inlet / outlet holes 4.

[0028] After adding the oil-water mixture, the left and right basic holes are connected to the circulation pipeline 5, and the valves 6 at both ends of the circulation pipeline 5 are closed. The circulation pipeline 5 is connected to the inlet / outlet holes 4 at both ends of the heating furnace 3, which is used to flow the heated high-temperature medium into the cooling system and can effectively prevent the heated medium from splashing to the outside during the heating process to ensure safety. There is an aperture 1 with a diameter of 0.2 meters at intervals of 30 degrees on the surface of the heating furnace 3 (in the central vertical plane). The aperture 1 is used to place the electromagnetic heating element 2. According to the specific heating requirements and environment, the corresponding number of electromagnetic heating elements 2 are inserted into the apertures 1 on the surface of the heating furnace 3, and the electromagnetic heating elements 2 and the heating furnace 3 are fixedly connected with screws through the fixing device surface on the electromagnetic heating elements 2. After the fixing is completed, the power-on switch can be pressed, and the coils 21 in the electromagnetic heating elements are energized for induction heating. The wall temperature of the electromagnetic heating element 2 rises rapidly, and the heat is transferred to the medium in the heating furnace 3 through heat conduction. The temperature of the medium is judged whether it reaches the required temperature by observing the display temperature of the first thermometer 26 set on the heating device. When the predetermined required temperature is satisfied, the switch is pressed to cut off the power supply to the coils 21 and stop heating.

[0029] As Figure 2-3 shown, in the present invention, the electromagnetic heating element 2 (the material of which is preferably ferritic stainless steel T4003, with good heat transfer effect and magnetic permeability, greatly improving the heating efficiency) includes: A fixing device surface for fixing to the bottom hole 14 on the heating furnace 3; The wiring device 12 is arranged at the upper end of the fixing device surface. The coil 21 thereon is connected from the wire inlet 13 between the inner wall surface 20 and the outer wall surface 19 of the electromagnetic heating element 2. The heating column 18 is located at the lower end of the fixing device surface, and its two ends are respectively connected to the lower end of the fixing device surface and the outer wall surface 19. The heating wall surface 17 is located inside the heating column 18, and there is a gap for the heating medium to pass between it and the heating column 18. The heating wall surface 17 has grooves 15; fixing device surface; 16.

[0030] The connection of the above electromagnetic heating component provided by the present invention is specifically as follows: The electromagnetic heating element 2 is fixedly connected to the surface of the heating device (heating furnace 3) through the bottom hole 14 on the fixing device surface using screws. The coil 21 on the wiring device 12 is connected between the inner wall surface 20 and the outer wall surface 19 of the electromagnetic heating element 2 from the wire inlet 13 (near the top 11 of the electromagnetic heating element). The coil 21 is wound in a circular ring shape with uniform multiple turns between the inner wall surface 20 and the outer wall surface 19 of the electromagnetic heating element 2. After pressing the power switch, the heating wall surface 17 and the heating column 18 of the electromagnetic heating element 2 quickly heat up, and the heat is transferred to the heating medium through heat conduction to complete heating. There is a gap between the heating column 18 and the heating wall surface 17 to facilitate the flow of the heating medium. A large - area groove 15 is dug in the middle of the heating wall surface 17; fixing device surface; 16, to prevent the local temperature of the heated medium from being too high and achieve uniform heating.

[0031] The lower half of the electromagnetic heating element 2 is composed of two cylindrical wall surfaces (the wall thickness is preferably 0.3 cm, which enhances the heat transfer effect and improves the heating efficiency) (forming the inner wall surface 20 and the outer wall surface 19 respectively). The coil 21 is evenly wound between the inner wall surface 20 and the outer wall surface 19. The upper ends of the inner wall surface 20 and the outer wall surface 19 are welded together, and the lower ends are kept open. The welded part above is the upper half of the electromagnetic heating element 2, which is composed of two columns and two cylindrical wall surfaces. There are rectangular through - holes with four corners cut on the wall surface. There is a gap between the heating column 18 and the heating wall surface 17. The top of the electromagnetic heating element 2 is outside the heating furnace 3 when inserted into the furnace body. There is a circle of threads on it for fastening the electromagnetic heating element 2, and there is a split wire pipe with a diameter of 2.5 cm on the side of the upper part to connect the coil 21.

[0032] As Figure 1 、 5 shown, in the present invention, the cooling device 9 includes: Cooling elements, which are formed by connecting several groups of cooling bodies 22 in series through small pipes 10; Several groups of the cooling elements are connected in series and / or in parallel to form the cooling device 9.

[0033] The cooling bodies 22 are preferably grouped in sets of five and arranged horizontally, and are connected through small pipes 10. There are cooling body inlet and outlet holes 23 at both the left and right ends of the cooling bodies 22 for the inflow and outflow of the medium.

[0034] In the present invention, the cooling device 9 is buried underground.

[0035] As Figure 1 shown, in the present invention, temperature sensors 7 are provided at both ends of the heating device for measuring the temperature of the medium in the circulation pipeline 5. The temperature sensors 7 are preferably thermocouple sensors As Figure 1 shown, in the present invention, valves 6 are provided at both ends of the heating device to control the flow of the medium. The valves 6 are preferably globe valves In the present invention, the material of the circulation pipeline 5 is preferably a nickel-based alloy.

[0036] As Figure 1 shown, in the present invention, a first thermometer 26 is provided on the heating device for determining whether the temperature of the medium in the heating device reaches the required temperature.

[0037] As Figure 4 shown, in the present invention, a heat insulation material 24 is laid on the outer wall surface 19 of the heating device. The heat insulation material 24 is used to reduce the heat dissipation of the heating furnace 3 during the heating process and improve the heating efficiency. The heat insulation material 24 is preferably phosphate castable As Figure 1 shown, in the present invention, it further includes: A pump 25, connected to the circulation pipeline 5, for pumping the heated medium into the heating device to provide the power for the circulation of the medium. The pump 25 is preferably a centrifugal pump 25 As Figure 1 shown, after the heating is completed, the valves 6 at both ends of the heating furnace 3 can be opened, and the pump 25 is used to pump the heated high-temperature medium into the pipeline. And the temperature of the medium in the pipeline is measured according to the temperature sensor 7, and then it flows into the cooling bodies 22 of the circulation cooling device 9 through the small pipes 10. Every five cooling bodies 22 are assembled into a set of cooling elements, with three sets longitudinally and five sets horizontally, and a total of 75 cooling bodies 22 are distributed. The high-temperature medium will flow into and be stored in each cooling body 22 for cooling. The cooling device 9 is buried underground to prevent the medium from condensing and blocking the pipeline due to too low temperature in winter. After cooling, the medium flows out of the cooling body 22 through the small pipes 10 into the circulation pipeline 5, and the temperature sensor 7 measures the temperature of the cooled medium, and then flows into the heating furnace 3, and circulates until it is cooled to the target temperature, and then the obtained cooled liquid is taken out from the inlet and outlet holes 4 at both ends of the heating furnace 3, and the medium that has completed heating and circulation cooling can be obtained.

[0038] The present invention also provides a preferred embodiment of the dimensions of each component in the above oil-water mixture heating system with circulating heating and cooling, which is as follows The thickness of the inner and outer cylindrical wall surfaces (inner wall surface 20 and outer wall surface 19) of the coil 21 of the electromagnetic heating element 2 is 0.3 cm. The outer diameter of the outer wall surface 19 is 21.9 cm, and the inner diameter is 21.6 cm; the outer diameter of the inner wall surface 20 is 16.8 cm, and the inner diameter is 16.5 cm; the overall length of the electromagnetic heating element 2 in the heating furnace 3 is 86 cm. The heating columns 18 are a plurality of cylinders with a diameter of 5 cm and a height of 26 cm.

[0039] The material of the electromagnetic heating element 2 is ferritic stainless steel T4003. The coil 21 is in a circular ring shape and is evenly wound in multiple turns between the inner and outer wall surfaces 19 of the heating element. The bottom hole 14 for fixing the electromagnetic heating element 2 on the surface of the heating furnace 3 has a diameter of 1 cm.

[0040] The heating furnace 3 is formed by splicing a hollow cylinder and two hollow hemispheres. The diameter of the hemispheres is 2.4 m; the length of the cylinder is 2.5 m, and the diameter is 2.4 m; the surface thickness of the heating furnace 3 is 0.3 cm, and the thickness of a layer of heat insulation material 24 covering its surface is 1 cm.

[0041] The diameter of the hole 1 on the surface of the heating furnace 3 is 0.2 m, and a hole 1 is provided every 30 degrees around the center of the vertical plane. The diameter of the inlet and outlet holes 4 on both side ends of the heating furnace 3 is 5 cm; The diameter of the circulation pipeline 5 is 5 cm, and the thickness is 0.1 cm; the small pipeline 10 is a pipeline with a diameter of 1.5 cm and a thickness of 0.05 cm.

[0042] The cooling device 9 is a cube with a length of 50 cm, a width of 20 cm, and a height of 10 cm. The diameter of the inlet and outlet holes 23 of the cooling body is 1.5 cm. Five cooling bodies 22 are arranged in parallel in sequence along the pipeline flow direction, with a spacing of 5 cm.

[0043] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An oil-containing water heating system with electromagnetic induction cycle heating and cooling, characterized in that: include: A heating device, with inlet and outlet holes at both ends for the heated medium to flow in and out, the inlet and outlet holes at both ends of the heating device being connected through a circulation pipeline; The cooling device has two ends connected to the circulation pipeline. The heated medium flows into the cooling device from one end to be cooled and flows out to the circulation pipeline from the other end.

2. The oil-water mixture heating system with electromagnetic induction cycle heating and cooling according to claim 1, characterized in that: The heating device comprises: The heating furnace has a circle of electromagnetic heating elements arranged along the circumference of the inner surface, wherein one electromagnetic heating element is arranged at intervals of 30 degrees on the vertical plane of the circumference where the electromagnetic heating element is located.

3. The oil-water mixture heating system with electromagnetic induction cycle heating and cooling according to claim 2, characterized in that: The electromagnetic heating element comprises: A fixing device surface, used for fixing to the bottom hole on the heating furnace; A wiring device, arranged at the upper end of the fixing device surface, wherein the coil on the wiring device is connected between the inner wall surface and the outer wall surface of the electromagnetic heating element through the wire entry port; A heating column, which is located at the lower end of the fixing device surface, and has two ends connected to the lower end of the fixing device surface and the outer wall surface respectively; The heating wall surface is located inside the heating pillar, and a gap is left between the heating pillar and the heating wall surface for the heating medium to pass through. The heating wall surface is provided with a groove.

4. The oil-water mixture heating system with electromagnetic induction cycle heating and cooling according to claim 1, characterized in that: The cooling device comprises: The cooling element is composed of several groups of cooling bodies connected in series through small pipes; Several groups of cooling elements are connected in series and / or in parallel to form the cooling device.

5. The oil-water mixture heating system with electromagnetic induction cycle heating and cooling according to claim 4, characterized in that: The cooling device is buried underground.

6. The oil-water mixture heating system with electromagnetic induction cycle heating and cooling according to claim 1, characterized in that: Temperature sensors are provided at both ends of the heating device.

7. The oil-water mixture heating system with electromagnetic induction cycle heating and cooling according to claim 1, characterized in that: Valves are arranged at both ends of the heating device.

8. The oil-water mixture heating system with electromagnetic induction cycle heating and cooling according to claim 1, characterized in that: The heating device is provided with a first thermometer.

9. The oil-water mixture heating system with electromagnetic induction cycle heating and cooling according to claim 1, characterized in that: The outer wall surface of the heating device is paved with heat-insulating material.

10. An oil-water mixture heating system with electromagnetic induction cycle heating and cooling according to any one of claims 1 to 9, characterized in that: Also includes: A pump is connected to the circulation pipeline and is used to pump the heated medium into the heating device.

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